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function widget:GetInfo()
  return {
    name      = "chiliGUIDemo",
    desc      = "GUI demo for robocracy",
    author    = "quantum",
    date      = "WIP",
    license   = "WIP",
    layer     = 1,
    enabled   = false  --  loaded by default?
  }
end


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-- gui elements
local window0
local window01
local gridWindow0
local gridWindow1
local windowImageList
local window1
local window2
local window3

function widget:Initialize()
	Chili = WG.Chili

	local function ToggleOrientation(self)
		local panel = self:FindParent"layoutpanel"
		panel.orientation = ((panel.orientation == "horizontal") and "vertical") or "horizontal"
		panel:UpdateClientArea()
	end

	--------------------------------------------------------------------------------
	--------------------------------------------------------------------------------

	local testText =
	[[Bolivians are voting in a referendum on a new constitution that President Evo Morales says will empower the country's indigenous majority.

Около 863 года братья Константин (Кирилл) Философ и Мефодий из Солуни (Салоники) по приказу византийского императора Михаила III упорядочили письменность для старославянского языка и использовали новую азбуку.

日本は集団的自衛被告とする権利を行使することができるように、政府は憲法解釈にのみ「最小」変更を行うことがあります...

Եբրայերեն (עברית - իվրիտ, իվղիտ)՝ Սեմական լեզվաընտանիքի լեզու։
]]

	local testText2 =
	"\255\001\255\250Bolivians\b are voting in a referendum on a \255\255\255\000new\b constitution "

	local testText3 =
	[[Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod]]

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	--------------------------------------------------------------------------------

	local cs = {
		Chili.Button:New{
			x      = 20,
			y      = 20,
		},
		Chili.Label:New{
			x      = 20,
			y      = 50,
			caption= 'FOOBAR',
		},
		Chili.ScrollPanel:New{
			backgroundColor = {0,0,0,0.5},
			children = {
				Chili.Button:New{caption="foo", width = 100, height = 100},
			}
		},
		Chili.Checkbox:New{
			x     = 20,
			y     = 70,
			caption = 'foo',
		},
		Chili.Trackbar:New{
			x     = 20,
			y     = 90,
		},
		Chili.Colorbars:New{
			x     = 20,
			y     = 120,
		},
		Chili.ComboBox:New{items = { "opt1", "opt2", "opt3", "opt4", "opt5", "opt6", "opt7", "opt8", "opt9", "opt10", "opt11", "opt12", }},
	}

	window0 = Chili.Window:New{
		x = 200,
		y = 450,
		width  = 200,
		height = 200,
		parent = Chili.Screen0,

		children = {
			Chili.StackPanel:New{
				height = "100%";
				width  = "100%";
				weightedResize = true;
				children = {
					Chili.Button:New{caption="height: 70%", weight = 7; width = "90%"},
					Chili.Button:New{caption="height: 30%", weight = 3},
				};
			}
		},
	}

	local btn0 = Chili.Button:New{
		caption = "Dispose Me",
		name = "btn_dispose_me1",
	}
	btn0:Dispose()

	-- we need a container that supports margin if the control inside uses margins
	window01 = Chili.Window:New{
		x = 200,
		y = 200,
		clientWidth  = 200,
		clientHeight = 200,
		parent = Chili.Screen0,
	}

	local panel1 = Chili.StackPanel:New{
		width = 200,
		height = 200,
		--resizeItems = false,
		x=0, right=0,
		y=0, bottom=0,
		margin = {10, 10, 10, 10},
		parent = window01,
		children = cs,
	}

	local gridControl = Chili.Grid:New{
		name = 'foogrid',
		width = 200,
		height = 200,
		children = {
			Chili.Button:New{backgroundColor = {0,0.6,0,1}, textColor = {1,1,1,1}, caption = "Toggle", OnMouseUp = {ToggleOrientation}},
			Chili.Button:New{caption = "2"},
			Chili.Button:New{caption = "3"},
			Chili.Button:New{caption = "4", margin = {10, 10, 10, 10}},
			Chili.Button:New{caption = "5"},
			Chili.Button:New{caption = "6"},
			Chili.Button:New{caption = "7"},
		}
	}

	gridWindow0 = Chili.Window:New{
		parent = Chili.Screen0,
		x = 450,
		y = 450,
		clientWidth = 200,
		clientHeight = 200,
		children = {
			gridControl
		},
	}

	gridWindow1 = Chili.Window:New{
		parent = Chili.Screen0,
		x = 650,
		y = 750,
		clientWidth = 200,
		clientHeight = 200,
		children = {
			Chili.Button:New{right=0, bottom=0, caption = "2", OnClick={function()
				--gridWindow1:GetObjectByName("tree_inspector")
			end}},
			Chili.TextBox:New{x=0, right=0, y=0, text = testText2},
			Chili.EditBox:New{width = 200, y = 40, --[[autosize = true,]] text = testText3},
			Chili.ComboBox:New{right = 10, x = 0, y = 90, items = { "opt1", "opt2", "opt3", "opt4", "opt5", "opt6", "opt7", "opt8", "opt9", "opt10", "opt11", "opt12", }},
			Chili.Image:New{ x=0, right=0, y=120, file = "#1" },
			Chili.Button:New{
				caption = "Dispose Me",
				name = "btn_dispose_me2",
				x="5%", y=70,
				width = "90%",
				Update = function(self, ...)
					--NOTE: this is performance-wise the _worst_ possible way to make animation
					Chili.Button.Update(self, ...)
					self.backgroundColor = {math.sin(os.clock() * 4) * 0.5 + 0.5, 0, 0, 1}
					self:Invalidate()
					self:RequestUpdate()
				end,
				OnClick = {function(self) self:Dispose() end},
			},
			Chili.Button:New{
				-- gets disposed in widget:Update
				caption = "Dispose Me 2",
				name = "btn_dispose_me3",
				x="5%", y=90,
				width = "90%",
			},
			Chili.Button:New{
				-- gets disposed below
				caption = "Dispose Me",
				name = "btn_dispose_me4",
				x=0, y=120,
			},
		},
	}
	gridWindow1:GetObjectByName("btn_dispose_me4"):Dispose()

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	--------------------------------------------------------------------------------

	windowImageList = Chili.Window:New{
		x = 700,
		y = 200,
		clientWidth = 410,
		clientHeight = 400,
		parent = Chili.Screen0,
	}

	local control = Chili.ScrollPanel:New{
		x=0, right=0,
		y=0, bottom=0,
		parent = windowImageList,
		children = {
			--Button:New{width = 410, height = 400, anchors = {top=true,left=true,bottom=true,right=true}},
			Chili.ImageListView:New{
				name = "MyImageListView",
				x=0, right=0,
				y=0, bottom=0,
				dir = "LuaUI/Images/",
				OnSelectItem = {
					function(obj,itemIdx,selected)
						Spring.Echo("image selected ",itemIdx,selected)
					end,
				},
				OnDblClickItem = {
					function(obj,itemIdx)
						Spring.Echo("image dblclicked ",itemIdx)
					end,
				},
				OnDirChange = {
					function(obj,itemIdx)
						if obj.parent and obj.parent:InheritsFrom("scrollpanel") then
							obj.parent:SetScrollPos(0,0)
						end
					end,
				}
			}
		}
	}


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	window1 = Chili.Window:New{
		x = 450,
		y = 200,
		clientWidth  = 200,
		clientHeight = 200,
		resizable = true,
		draggable = true,
		parent = Chili.Screen0,
		dockable = true,
		children = {
		Chili.ScrollPanel:New{
			width = 200,
			height = 200,
			x=0, right=0,
			y=0, bottom=0,
			horizontalScrollbar = false,
			children = {
					Chili.TextBox:New{width = 200, x=0, right=0, y=0, bottom=0, text = testText}
				},
			},
		}
	}

	window2 = Chili.Window:New{
		x = 900,
		y = 650,
		width  = 200,
		height = 200,
		parent = Chili.Screen0,
		dockable = true,

		children = {
			Chili.TabBar:New{
				x=0, right=0,
				y=0, height=20,
				minItemWidth = 50,
				tabs = {"tab1", "tab2", "tab3",},
			},
			Chili.ScrollPanel:New{
				x=0, right=0,
				y=30, bottom=0,
				children = {
					Chili.TreeView:New{
						x=0, right=0,
						y=0, bottom=0,
						defaultExpanded = true,
						nodes = {
							"foo",
							{ "bar" },
							"do",
							{ "re", {"mi"} },
							"la",
							{ "le", "lu" },
						},
					},
				},
			},
		},
	}

	local warnDispose = function(self)
		local ref = 0
		for i,v in pairs(self._hlinks) do
			ref = ref + 1
		end
		Spring.Echo("Warning object disposed!", self.classname, self.name, ref)
	end

	window3 = Chili.Window:New{
		caption = "autosize test",
		x = 1200,
		y = 650,
		width  = 200,
		height = 200,
		parent = Chili.Screen0,
		autosize = true,
		savespace = true,
		--debug = true,

		children = {
			Chili.Button:New{name = "btn_0", y = 20, width = 120, caption = "dispose btns below", OnClick = {function(self)
				local btna = window3:GetObjectByName("btn_a");
				local btnb = window3:GetObjectByName("btn_b");
				window3:RemoveChild(btna);
				window3:RemoveChild(btnb);
			end}},
			Chili.Button:New{name = "btn_a", y = 50, width = 120, caption = "autosize", OnDispose = {warnDispose}, OnClick = {function(self) window3:GetObjectByName("btn_a"):ToggleVisibility(); window3:GetObjectByName("btn_b"):ToggleVisibility(); end}},
			Chili.Button:New{name = "btn_b", y = 80, width = 120, caption = "autosize", OnDispose = {warnDispose}, OnClick = {function(self) window3:GetObjectByName("btn_a"):ToggleVisibility(); window3:GetObjectByName("btn_b"):ToggleVisibility(); end}},
		},
	}

	window3:GetObjectByName("btn_b"):Hide()
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end --Initialize


function widget:Update()
	local btn = gridWindow1:GetObjectByName("btn_dispose_me3")
	btn:Dispose()
	widgetHandler:RemoveCallIn("Update")
end


function widget:Shutdown()
	window0:Dispose()
	window01:Dispose()
	gridWindow0:Dispose()
	gridWindow1:Dispose()
	windowImageList:Dispose()
	window1:Dispose()
	window2:Dispose()
	window3:Dispose()
end

